Portable drilling-machine for oil-wells



(No Mdel.)

- l 1 R. M. DOWNIB PGRTABLE-DRILLING MAGHINE' PQR OIL WELLS, am; No. 251,841. Patented Jan.` 3,1882.'

a/fw@ invention.

AUNITED STATES PATENT OFFICE. I

ROBERT M. DOWNIE, OF ALLEGHENY, PENNSYLVANIA.

PORTABLE DRILLING-MACHINE FOR OIL-WELLS, 80C.

SPECIFICATION forming part of Letters Patent No. 251,841, dated January 3, 1882.

Application filed November 25, 1881.

siding atAllegheny, in the county of Allegheny vand State of Pennsylvania, have invented certain new and useful Improvements in Portable Drilling-lVI-achines for Oil-Wells,`&c.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference heilig had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specitication.

My invention relates to portable drillingmachines, Iand is an improvement on my former invention, for which a patent was granted me by the United States, bearing date of June l5, 1880, No. 228,737 and it consists in the introduction of new parts and in a slight change of others, whereby the machine is made more eli'ective, as will be fully described hereinafter.

The' accompanying drawings represent my Figure l is aside elevationof my invention. Fig. 2 is a plan view of the same.

The frame A, with all that pertains to the machine, including steam-engine and boiler, is placed upon wheels, and may be transported from `place to place inits entirety.

The spring-pole described in my former patent l discard and substitute therefor a rigid walking-beam, a, of which the rear end is pivoted on top of the post K, its middle sliding up or down in guides upon the post J. The elasticity lost in the exchange of a rigid beam for a spring-pole is compensated by a spring at the bottom of a tube placed under the beam a in front or near the post J, in which tube is aplunger resting on the spring. A rod on the plunger bears against the under side of thfebeam and assists by the reaction of the spring in elevating the beam after each dcscent.

At the front of the frame A are bearingsB, on which is journaled the cable-reel f, having on one of its ends the cog-wheel O. In front of the reel f is another smaller one, i, which carries the sand-pump rope. At the side op- (No model.)

posite to the wheel C on the shaft ot' the reel t is a small friction-Wheel, n, that is jiournaled in a sliding box, L, operated by the lever O. By means of this lever the friction-wheel n can be brought in contact with a ange, Q, on the rim of the driving-Wheel R, and when in contact turns the reel t'.

Foremost on the bearings B is the shaft of the driving-wheel R, with the cog-wheel S on its other end. The wheel S is provided with a wrist-pin, l, to which the rod T is attached, that forms the connecting-link between the wheel S and the beam a, to which it im parts its motion. At the extreme forward end of the beam is suspended a temper-screw, to which the cable that bears the drilling-tool is attached.

Between the cog-wheels S and C, at the side of the frame A, is introduced the smaller cogwheel M, by which a connection between the driving-Wheel R and the cable-reel fis esta-blished. This wheel M, when thereel. is notin use, is thrown out of gear, when the wheels S and C cease to act together. y

The changes made in this improvement, differing from Vmy former invention, consist in the beam a and in wheels S and C, they being here provided with cogs. The addition of the wheel M to better control the cable-reel f and the tube p, with its spring and plunger, are made to facilitate the working of the machine. This and the whole machine being placed in one frame upon Wheels, thus allowing the machine to be moved and operated without dismonnting or disconnecting any of its parts, constitutes the improvement.

Having thus described my invention, I claim- 1 1. In a portabledrilling-machine, the combination of the reelfaud cog-wheels S, C, and m with the driving-wheel R, as shown and described.

2.` In a portabledrilling-machine, the combination of the driving-wheel R, wheel S, rod T, beam c, and tube p, arranged as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

R. M. DOWNIE.

Witnesses: p

CHARLES J. BARR, T. F. LEHMANN, 

